We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green 288-pin DDR4 DIMM with black chips and silver heatsink

A-Tech

A-Tech 32GB DDR4 2666MHz ECC RDIMM 2Rx4 for HP P05590-B21 P28221-B21 Server Memory

SKU CH-R0EE-CPPVP

32 GB DDR4 2666 MHz ECC RDIMM with CL19 latency and 1.2 V operation for HP P05590-B21 and P28221-B21 servers

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 32 GB capacity handles heavy server workloads
  • DDR4 2666 MHz CL19 speed delivers responsive data throughput
  • ECC RDIMM registered design protects data integrity
  • 2 V operation matches standard DDR4 voltage
  • 288-pin DIMM fits HP P05590-B21 and P28221-B21

32GB DDR4 ECC RDIMM for HP Servers

This 32GB DDR4 2666MHz ECC registered DIMM is built for HP servers using part numbers P05590-B21 and P28221-B21. It delivers 32GB of capacity in a single 288-pin module running at 1.20V with CL19 latency. The 2Rx4 organisation and major-brand chips target administrators who need reliable, error-correcting memory for virtualization or database workloads.

Replacing lower-capacity or non-ECC modules

Swapping standard unbuffered DIMMs or smaller registered sticks for this 32GB module adds error correction and higher density per slot. The upgrade is worth it when the platform supports registered ECC memory and the workload demands data integrity over raw latency. Systems limited to unbuffered memory or lower maximum module sizes cannot use this part.

DDR4 2666 registered ECC constraints

The DDR4 2666 interface caps bandwidth at the PC4-21300 rate and requires a memory controller that drives registered ECC modules at 1.20V. Platforms restricted to lower speeds, unbuffered DIMMs, or non-ECC operation will not accept this module. Mixed populations with different ranks or speeds may force the channel down to the lowest common denominator.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $140.99
Cheaper than about 58% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $4.41 per GB
Cheaper than about 78% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Total capacity32 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.2 V

Questions about this item

Will the 288-pin DDR4 DIMM fit my HP server that uses P05590-B21 or P28221-B21 memory?

Yes, this 32 GB registered ECC module is built to the 288-pin DDR4 DIMM form factor and is a compatible equivalent for both HP part numbers.

What is the correct way to seat this registered ECC module and what step do people often miss?

Align the notch with the slot key, press straight down until the retention clips click, then verify the system recognises the full 32 GB at 2666 MHz in BIOS.

How long is this module expected to last and what would trigger a replacement?

The module carries a lifetime warranty; replacement is only needed if a memory test reports uncorrectable ECC errors or the server fails to POST with the DIMM installed.

More in ECC Server RAM

Similar items